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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,283 Views)
Incinerox
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Āeksiot Zaldrīzoti

It's way too large.

It's about midway between Anzu and Gigantoraptor in size.
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babehunter1324
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Actually I don't find the sexual dimorphic/individual variation theory so far fetched...

Posted Image

Southern Island Moa's weight by avarage about twice as much as males.
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Lazardi
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Are there any known informations about the locomotion of the Caribbean ground sloths? Did they truly are non-knuckle-walkers like most restorations we've seen?
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Posted Image Flish
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babehunter1324
Jun 14 2016, 07:37 AM
Actually I don't find the sexual dimorphic/individual variation theory so far fetched...

Posted Image

Southern Island Moa's weight by avarage about twice as much as males.
I wouldn't say it's likely, but it's definitely not impossible. There are plenty of birds, like moas, that have or had crazy sexual dimorphism.
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Jannick
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Papua merdeka!

Indeed, several extant examples that come to mind are Bustards and Capercaillies, with males that are over twice the size of females.
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Incinerox
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Āeksiot Zaldrīzoti

I do not quite understand how this works.

How does a female moa be 1.5x larger, but only 2x heavier than its male counterpart? That's not how mass scaling works. ._.
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babehunter1324
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I was going by memory there.

Turns out the difference was greater. MUCH GREATER.

http://rspb.royalsocietypublishing.org/content/280/1760/20130401

:jawdrop:

No wonder they were long assumed to represent different species.

Also I always found quite intersting how in some ratites the female is massively larger than the male as in the Southern Moa while in others the male is actually the larger of the two as in Ostriches.

Now I don't think the evolution of a massive sexual dimorphism is likely outside an island envioriment though...
Edited by babehunter1324, Jun 16 2016, 06:39 PM.
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Incinerox
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Āeksiot Zaldrīzoti

> Males up to 84kg.
> Females up to 240kg.

THANK YOU. This is how mass scaling should look given the known lengths and heights of both sexes.
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Zoo Tycooner FR
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#Lithopédion

I know we practically have no datas about this species , but do we know how was the Chatham penguin (beside the fact that it certainly looked like a crested penguin) ?

I don't necessarily need a complete and specific description , a vague one would work .



Edited by Zoo Tycooner FR, Jun 16 2016, 11:34 PM.
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BossMan, Jake
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Son of God

So in previous years all better known Carboniferous spiders (megarachne and mesothelae) were found to be euripteryids

Is is possible that there were giant spiders though despite not much evidence to fully prove this? And if so would they be as big as previously thought?
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Acinonyx Jubatus
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I AM THE UNSHRINKWRAPPER!

BossMan, Jake
Jun 17 2016, 12:56 AM
So in previous years all better known Carboniferous spiders (megarachne and mesothelae) were found to be euripteryids

Is is possible that there were giant spiders though despite not much evidence to fully prove this? And if so would they be as big as previously thought?
Mesothelae wasn't a sea scorpion, it's a primitive group of modern spiders that BBC took and supersized to replace Megarachne when they found out it wasn't a spider.

All known carboniferous spiders were tiny, so from a phylogenetic viewpoint it's not very likely. But their respiration system and other bodily functions were at least as efficient as giant scorpions like Pulmonoscorpius, so from a biophysical viewpoint it's entirely possible.
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Incinerox
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Āeksiot Zaldrīzoti

Zoo Tycooner FR
Jun 16 2016, 10:31 PM
I know we practically have no datas about this species , but do we know how was the Chatham penguin (beside the fact that it certainly looked like a crested penguin) ?

I don't necessarily need a complete and specific description , a vague one would work .



Well it was a crested penguin. It was in the genus Eudyptes.

So you'd be looking at a bird which likely had bluish-black back feathers, a white belly, a red beak (which was comparatively slim compared to other crested penguin species), and pale yellow feathers running across its brow, forming a crest of some kind.

I'd want to say that your likeliest reference points are either the Fiordland, Snares or the Erect Crested penguins, given the Chatham penguin's location. But do bear in mind that it had a slightly slimmer beak than its relatives (they're normally quite short and thick for penguins, but it was enough of a difference here to be at least notable).
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BossMan, Jake
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Son of God

We're hadrosaur teeth adapted to soft or rough vegetation or both?
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Incinerox
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Āeksiot Zaldrīzoti

Simple answer:

All vegetation.

Hadrosaur jaw mechanics and tooth batteries are some of the most complex food processing features in the animal kingdom.
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Paleodude
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ex-Krampus

Do we have any skin impressions from members of Ankylosauridae preferably closer to clubless ankylosaurs?
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